`How can we get into the computer without the usernames and passwords?What if there's an administration reset/backup keychain set and I can't remember what that is. I've tried every old password and the password hint isn't matching my answer (fantasy-place+year = Legoland80). Can I reset my computer completely? How do I go about doing that? How do I avoid that? I didn't send the key to apple like I should have, but took a screenshot with my computer, which is now not accessible anymore. I tried some other suggestions like deleting keychains, but I can delete all of them EXCEPT the one that needs to be deleted. I'm to the point where I can't even install apps or burn discs anymore. HELP!!
Made perfect sense to me. I had to do this when my daughter forgot her password.
You can reset the password on your Mac without a boot disk.